Member of Technical Staff Post Training

Frontier AI research lab building the FLUX family of multimodal visual-intelligence models and delivering them through an API, playground, and open weights.

Freiburg im Breisgau, Germany
About Black Forest Labs

Black Forest Labs develops generative AI models for image, video, audio, and action prediction, alongside production API and enterprise deployment offerings.

View jobs by Black Forest Labs

Skills

Candidate Availability

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will own multimodal post-training from data curation through deployment. You will advance fine-tuning, preference optimization, distillation, safety tuning, and evaluation; build personalization capabilities and high-throughput infrastructure; and identify and close quality and alignment gaps through research and engineering.

Requirements

  • Experience owning post-training for a frontier generative model through release
  • Experience with reward modeling, preference learning, RLHF, RLAIF, and personalization
  • Experience across text-to-image, image editing, multi-reference, or video models
  • PyTorch proficiency
  • Measurable model-quality improvements delivered to users

Responsibilities

  • Own the post-training pipeline from data curation through deployment
  • Advance fine-tuning, preference optimization, distillation, safety tuning, and evaluation
  • Develop multimodal post-training capabilities
  • Build personalization and customization capabilities
  • Design and maintain high-throughput fine-tuning and evaluation infrastructure
  • Identify and close model-quality and alignment gaps

Benefits

  • Equity
  • Reasonable travel costs covered